CVE-2025-21440 Out-of-bounds Read in Windows WLAN Host
A memory corruption vulnerability in Qualcomm Snapdragon WLAN drivers allows attackers to execute arbitrary code or escalate privileges via crafted IOCTL calls.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-21440?
CVE-2025-21440 is a high-severity memory corruption vulnerability in Qualcomm Aqt1000 Firmware, published on 7 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Memory corruption when IOCTL call is invoked from user-space to write board data to WLAN driver.
Weakness: CWE-787
Which versions are affected by CVE-2025-21440?
It affects 49 products.
Products include Qualcomm Aqt1000 Firmware, Qualcomm Fastconnect 6200 Firmware, Qualcomm Fastconnect 6700 Firmware, Qualcomm Fastconnect 6800 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware and 43 more.
How do I fix CVE-2025-21440?
No fix has been published for CVE-2025-21440 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-21440 being exploited?
There is no known exploitation of CVE-2025-21440 in the wild and no public exploit code.
Other vulnerabilities in Qualcomm Aqt1000 Firmware
- CVE-2025-21479 Qualcomm Multiple Chipsets Incorrect Authorization
- CVE-2025-21480 Qualcomm Multiple Chipsets Incorrect Authorization
- CVE-2023-28562 Buffer Copy Without Checking Size of Input in QESL
- CVE-2022-40514 Buffer copy without checking size of input in WLAN Firmware
- CVE-2022-22096 Memory corruption in Snapdragon Connectivity, Snapdragon Mobile
Sources
Also known as GHSA-4m65-9g68-65w5.